Valverden.巴尔韦德(位于加那;西经 17º55' 北纬 27º48')
valven.瓣膜;真空管;阀门;电子管
valve gear member气门构件
Valve cam profile凸轮型线
valve-injection阀式浇注
valve-in-head顶置气门
valve type piston阀式活塞
valve replacement瓣膜替换术
valve rod knuckle阀杆肘
valve shaft guide气门导管
valve helmet mask活门头兜面具
valve point curve阀点曲线